Good morning everyone,
need to use rich: columns in a project but am having the following error:

WARNING: /pages/buscaAvancada.xhtml @187,7 var="coluna" Property 'var' is not on type: org.richfaces.component.html.HtmlColumn

what's wrong in my code?
Thank you.

<rich:dataTable value="#{buscaAvancada.model}" var="protoc"
                    width="750">
                    <f:facet name="header">
                        <h:outputText value="Rules"></h:outputText>
                    </f:facet>
                    <rich:columns value="#{buscaAvancada.colunas}" var="coluna">
                        <f:facet name="header">
                            <h:outputText value="#{coluna.text}" />
                        </f:facet>

                        <h:outputText value="#{protoc[0]}" />
                    </rich:columns>
                </rich:dataTable>

private List<HtmlColumn> colunas = new ArrayList<HtmlColumn>();

    public void createColumn(String name) {
        HtmlColumn column = new HtmlColumn();       
        column.setLabel(name);
        colunas.add(column);
    }

    public List<HtmlColumn> getColunas() {
        return colunas;
    }

    public void setColunas(List<HtmlColumn> colunas) {
        this.colunas = colunas;
    }